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BD555BKFV Schematic ( PDF Datasheet ) - Rohm

Teilenummer BD555BKFV
Beschreibung AC/DC Controller IC
Hersteller Rohm
Logo Rohm Logo 



Gesamt 15 Seiten
		
BD555BKFV Datasheet, Funktion
Datasheet
BD555BKFV AC/DC Controller IC
for mains dimmable LED lighting
BD555BKFV
General Description
The BD555BKFV controller AC/DC controller IC can be
used in a wide range of dimmable LED lighting driver
applications. The main target application is dimmable
retro-fit LED lighting, replacing existing incandescent
light bulbs, halogen spot lights, CFL tubes etc.
Features
Fixed frequency DC/DC controller (selectable)
Peak current or average current control (PCC/ACC)
Dynamic Load Current Controller (DLCC)
Logarithmic compensation of detected dimming level
Dimmer detector function
Anti-flash function when dimmer is OFF
PWM and analog dimming control supported
Over Current Protection (OCP)
Thermal Shutdown protection (TSD)
Under Voltage Lock Out (UVLO)
Key Specifications
Input voltage range........................................16~39V
Regulated supply voltage.................................11.5V
Fixed DC/DC operating frequency.........40~400kHz
Detectable phase-cut range........................45°~135°
Typical current consumption.............................1mA
Under Voltage Lock Out detection.....................9.0V
Operating temperature range.................-40~+110°C
Package
SSOP-B14
W(Typ.) x D(Typ.) x H(Max.)
5.00mm x 6.40mm x 1.15mm
Applications
Retro-fit dimmable LED lighting (E27, E14, GU10, T8
etc.). Wide range of TRIAC and transistor dimmers
supported by DLCC function.
Custom LED lighting with PWM or voltage controlled
dimming.
Typical Application Circuits
Figure 1. Typical application circuit for non-isolated dimmable buck topology
Product structureSilicon monolithic integrated circuit
.www.rohm.com
© 2013 ROHM Co., Ltd. All rights reserved.
TSZ2211114001
This product is not designed protection against radioactive rays
1/12
TSZ02201-0W1W0C300010-1-2
30.July.2013 Rev.003






BD555BKFV Datasheet, Funktion
BD555BKFV
Datasheet
Parameter
Limits
Symbol
Unit
Min. Typ. Max.
Comments
SW minimum ON-time
tON,min - 80 140 ns Determines minimum duty-cycle
SW slew rate
tSW,slew - 50 100 ns VSW = 1…11V at 1nF load (rising/falling)
SW driver ON resistance (PMOS) RSW,P - 15 40 VSW=0V, ISW=-10mA
SW driver OFF resistance
(NMOS)
RSW,N - 15 40 VSW= VDDH, ISW=10mA
Duty cycle, FB=3.5V
Duty cycle, FB=2.9V
δ20 2 20 38 %
ACC mode
δ60 36 60 80 %
FB mode selection threshold
VFB,mode 1.4 1.6 1.9
V PCC (VFB<1.4V), ACC (VFB>1.9V)
ISNS trigger voltage (OCP)
VOCP 1.08 1.20 1.36 V Inductor current limiter in ACC mode
ISNS blanking time (OCP)
tOCP,blank 90 140 180 ns Used in PCC & ACC mode
Dimmer phase-cut detector
DET phase cut voltage (rising)
DET phase cut voltage (falling)
VDET,r
VDET,f
215 260 300 mV
Monitored at output bridge rectifier
75 110 190 mV
DET phase cut hysteresis
VDET,hys 75 130 180 mV
DIM voltage (no dimming)
VDIM1 2.85 3.0 3.15 V Phase-cut = 135°
DIM voltage (max dimming)
VDIM2 0.95 1.0 1.05 V Phase-cut = 45°
REF voltage (no dimming) ACC
REF voltage (max dimming) ACC
VREF,A1 1.85 2.0 2.15
V ACC mode (VFB>1.9),
VREF,A2 75 100 135 mV 2k< RREF < 10k
ISNS voltage (no dimming) PCC
ISNS voltage (max dimming) PCC
VISNS,P1
VISNS,P2
1.12 1.24 1.36
200 260 316
V PCC mode (VFB < 1.5V). VISNS peak
mV current threshold, RREF=2k
Dynamic Load Current Controller
BLDR driver slew rate
BLDR driver ON resistance
BLDR driver OFF resistance
tBLDR,slew
RBLDR,P
RBLDR,N
-
-
-
15
100 300
100 300
us VSW = 1…11V at 1nF load (rising/falling)
VBLDR=0V, IBLDR=-10mA
VBLDR= VDDH, IBLDR=10mA
Strong load current
Strong load internal NMOS RON
ISBLD,sat 200 250
-
mA
Strong load current ON (VISYS<100mV,
VDIM<3.4V, VVDDH=11.5V, VWBLD-VISYS=8V)
RON,SBLD
-
10
300
Strong load current ON (VISYS<100mV,
VDIM<3.4V, VVDDH=11.5V, VWBLD-VISYS=8V)
Strong load current OFF delay
tSB,OFF 180 250 320 µs After phase-cut rising edge
Dimmer detector trigger voltage
VDIM,tr
3.3 3.5 3.7
V DLCC load current OFF
Dimmer detector release voltage
VDIM,rl
VDIM,tr-VDIM,hys
V DLCC load current ON
Dimmer detector hysteresis
VDIM,hys 50 100 170 mV
ISYS load current OFF voltage
VISYS,OFF -260 -200 -160 mV DLCC load current OFF
ISYS load current ON voltage
VISYS,ON
VISYS,OFF+VISYS,hys
mV DLCC load current ON
ISYS current sense hysteresis
VISYS,hys 75 100 140 mV
Anti-flash detector threshold
VDIM,start 360 400 440 mV DC/DC starts switching (VDIM >400mV)
*1 The supply regulator has a thermal shutdown function that triggers at about 175°C, having a hysteresis of about 20°C. This protects against a too high
junction-temperature (e.g. due to ‘short’ currents of VDDH, SW or BLDR to (P)GND on the PCB or excessive ambient temperatures).
www.rohm.com
© 2013 ROHM Co., Ltd. All rights reserved.
TSZ2211115001
6/12
TSZ02201-0W1W0C300010-1-2
30.July.2013 Rev.003

6 Page







BD555BKFV pdf, datenblatt
BD555BKFV
Revision History
Date
Revision
29.May.2012
19.July.2013
30.July.2013
001
002
003
Changes
New Release
Revision Update
p.2
Add “I/O” column to “Pin Description”.
p.5
Add “Notice1” and “Notice2” to “Absolute Maximum Ratings”.
p.7
Delete the descriptions for “Power Dissipation”.
Add the descriptions for “Notes of Pins Connections”.
p.13, p.14
Add “Notice”.
Datasheet
www.rohm.com
© 2013 ROHM Co., Ltd. All rights reserved.
TSZ2211115001
12/12
TSZ02201-0W1W0C300010-1-2
30.July.2013 Rev.003

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